Ruan Wengzhong

Ruan Wengzhong (Ch:阮翁仲) was a historical person during the Qin dynasty, who was recorded to have fought against the Xiongnu on the Great Wall at the border city of Lintao. He was allegedly a 3 meters tall giant. His story was first mentioned by the 3rd century CE writer Gao You in his commentary of the Huainanzi, and later developed in the  6th century Commentary on the Water Classic:

"In the 26th year of the First Emperor of Qin's reign, with all under heaven having just been annexed, there was a giant who appeared in Lintao. He was 5 zhang and his footprint was 8 chi long. So an image was drawn of him, and a metal statue was cast of his likeness. This was Wengzhong Junhe"

The First Emperor of China Qin Shihuang built a giant bronze statue of his likeness, in addition to his more famous Twelve Metal Colossi, by melting the bronze weapons captured in his victory over the Six Kingdoms. The statue was placed outside his Imperial Palace at Xianyang, near Xi'an.

"Wengzhong" has become a generic term for large scale statues of bronze and stone, and for jade statuettes (玉翁仲) placed within the coffin of the dead.

In Vietnamese legends
According to Việt Điện U Linh Tập, a 14th-century collection of Vietnamese history and mythologies, Ruan Wengzhong was called Lý Ông Trọng (李翁仲) and was a native of Từ Liêm district of Jiaozhi before becoming a Qin official. Lý Ông Trọng is still being worshipped in the Chèm Temple in his native hometown in today's Bắc Từ Liêm district of Hanoi.